[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/iron-test-helpers/test-helpers.js

 /**
  * @license
  * Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
  * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
  * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
  * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
  * Code distributed by Google as part of the polymer project is also
  * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
  */
 (function(global) {
+  'use strict';
 
   global.flushAsynchronousOperations = function() {
     // force distribution
     Polymer.dom.flush();
     // force lifecycle callback to fire on polyfill
     window.CustomElements && window.CustomElements.takeRecords();
   };
 
   global.forceXIfStamp = function(node) {
     var templates = Polymer.dom(node.root).querySelectorAll('template[is=dom-if]');
     for (var tmpl, i = 0; tmpl = templates[i]; i++) {
       tmpl.render();
     }
 
     global.flushAsynchronousOperations();
   };
 
   global.fireEvent = function(type, props, node) {
     var event = new CustomEvent(type, {
       bubbles: true,
       cancelable: true
     });
-    for (p in props) {
+    for (var p in props) {
       event[p] = props[p];
     }
     node.dispatchEvent(event);
   };
 
+  global.skipUnless = function(condition, test) {
+    var isAsyncTest = !!test.length;
+
+    return function(done) {
+      var testCalledDone = false;
+
+      if (!condition()) {
+        return done();
+      }
+
+      var result = test.call(this, done);
+
+      if (!isAsyncTest) {
+        done();
+      }
+
+      return result;
+    };
+  };
 })(this);